File:Operation of trains and station work and telegraphy (1916) (14758910615).jpg

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English:

Identifier: operationoftrain02prio (find matches)
Title: Operation of trains and station work and telegraphy
Year: 1916 (1910s)
Authors: Prior, Frederick John, 1858- (from old catalog) comp
Subjects: Railroad trains Railroads
Publisher: Chicago, F. J. Drake & co
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image:
and the perpendicular bars have no connection,space enough is allowed for a sheet of writing paper toplay freely between them. GROUND WIRE. Every office is supplied with a ground wire whichconsists of a wire attached to a rod driven several feetin the ground, or to a gas or water pipe, the two latterbeing preferable. The rod of iron should be filed orscraped bright and clean for several inches, and insulatedcopper wire spliced to five or six feet of bare copperwire wrapped evenly around the brightened part of therod, then tightly secured and soldered. Only theterminal ground wires are in use upon a line; their useat the intermediate offices is only for testing purposesand in case of interruption of the line to notify thetesting operator and receive his instructions. The in-termediate stations upon inserting a ground wire divideit into two independent circuits; there must be a mainline battery at each terminus in order that the two cir-cuits may work on either side of it 34 TELEGRAPHY
Text Appearing After Image:
SWITCH BOARD CONNECTIONS. £ « £ w 1 i 1 i Ground. £ .o -o • Inst. No. 1 £ Inst. No. 2 Inst. No. i on Line No. I.Inst. No. 2 on Line No. 2. -i =i !i =i Ground. £ -O. ■o. Inst. No. 1 £ Inst. No. 2 No. i cut out with inst. pins.No. 2 cut out at the bottom.35 36 TELEGRAPHY Ground. • g Inst, No. 1 £ Inst. No. 2 A A A o o o > c 4 > o o>....• (1 t Inst. No. i on No. i W. to No. 2 E.Ground on No. I E. and No. 2 W Ground. te Inst. No. 1 £ Inst. No. 2 A A A A i i i ; 4 ) ) ( ..... Inst. No. i on No. i E. to No. 2 W., Ground on No. I W.Inst. No. 2 on No. 2 E. to Ground. TELEGRAPHY 37 a Ground- ■tL^ .o.-o. Inst. No. 1 £ lust. No. 2 o o o No. i W. to No. 2 E.4 No. i E. to Nq. 2 W.Insts. on both circuits. !1 Ground. £ -O. -o. Inst. No. 1 c > o 1 # ( > i 1 )

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https://www.flickr.com/photos/internetarchivebookimages/14758910615/

Author Prior, Frederick John, 1858- [from old catalog] comp
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Flickr tags
InfoField
  • bookid:operationoftrain02prio
  • bookyear:1916
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Prior__Frederick_John__1858___from_old_catalog__comp
  • booksubject:Railroad_trains
  • booksubject:Railroads
  • bookpublisher:Chicago__F__J__Drake___co
  • bookcontributor:The_Library_of_Congress
  • booksponsor:The_Library_of_Congress
  • bookleafnumber:681
  • bookcollection:library_of_congress
  • bookcollection:americana
Flickr posted date
InfoField
27 July 2014



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current12:04, 12 February 2018Thumbnail for version as of 12:04, 12 February 20183,600 × 1,908 (728 KB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
22:45, 17 October 2015Thumbnail for version as of 22:45, 17 October 20151,908 × 3,604 (731 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Identifier''': operationoftrain02prio ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Foperationoftrain02prio%2F fin...

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